Porsche on some models made this knob in a different size. Please measure your thread prior to purchase. This knob is a M6x1.0 thread, some 911's came with a M5x.8 if this is the case in your car please purchase the FVD 552 911 16 instead.
Package Information
Also known as FVD55291120 FVD.552.911.20 FVD-552-911-20